I have 2 suggestions for auction house.
1. Implement buy orders, so people can set up an order when they look for a specific item, like buff food, monster cards, manastones etc.
You may take a look at the system in "Eve Online", where this works very good, and would enhance trade activity in my opinion.
2. Make some improvements for "mass buying" in auction house.
In the current state, when i list/select/filter several items i am interested in, like buff food, monster cards, cenedril items etc. i need to explicitly click "buy", and then again, "confirm" the action.
This is really time consuming, and annoying over time, with dozens, or even hundreds of purchases.
So, my suggestion:
Remove confirm dialogue (maybe check box, once per auction house use, if i want to confirm every time, or skip the confirm)
Or, make it possible to check any item (with checkbox) and then "mass buy" all of them
